The writer introduced briefly the load rating practices of Gears published by AGMA of the U.S. A in 1958, admitting that they are an advance in gear design for seores of years in U.S. and may also be helpful to the designers in other nations.是什么意思_The writer introduced briefly the load rating practices of Gears published by AGMA of the U.S. A in 1958, admitting that they are an advance in gear design for seores of years in U.S. and may also be helpful to the designers in other nations.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句